Which of the following is caused by reproductive isolation within a species

true, i don't really know what you're asking but from the info you provided im guessing the answer is true.

these muscles maintain the blood pressure in the vessels. the smooth muscles are innervated by nerves of the autonomic nervous system. when the muscles contract, they cause vasoconstriction of the vessels and increase blood pressure. when the muscles relax, they enable vasodilation of the   blood vessels hence reduce blood pressure.  

answeranovulation;